Pneumatic pump



H. J. HAWWCHORSTI PNEuMATlc PUMP. APPLICATION FILED JULY-2, I 9.1.9.

. y n W w wm Q mw 03m V ma 24 MLM vim N d 1m n J .w n d2 6 m ...l n Lw dm |||o El, n m j u x Nw m 5 5 Q .I,|.| w. um ,In M .www I Q d. \N\ WW, Nm o mm w .N .0 b m TM |.I. h MW M f o l, bw

87W mf ATTORNEYS0 H. L'HAWVICHOBST.

PNEUMATIC PUMP. APPLICATION FILED JULY 2,1919.

Patented J lily 20, 19%.

2 SHEETS-SHEET 2.

I ,INU Y i.,

the upper end of the pipe 8a.

A UNITED i STATES HENRY J'. HAWVICHORST, OIE TULARE, CALIFORNIA.

PNEUMATIC PUMP.

Specification of Letters Patent.

Patented July 20, 1920.

Application filed July 2, 1919. Serial No. 308,245.

To all whom it may concern:

Be it known that I, HENRY JOHN HAwvionons'r, a citizen of the UnitedStates, residing at Tulare, in the county of Tulare and State of California, have invented new and useful Improvements in Pneumatic Pumps, of which the following is a specification.

AMy invention is a pneumatic pump and consists of the novel features herein shown, described and claimed.

, The principal obj ect of my invention is to pump oil or water with an air pump at the top of thel well and to save the exhaust air to feed the air pump.

Figures 1` and 14 together form a. fragmentary sectional elevation of an air lift pump embodying the principles of my `1nvention and showing the pump 1n operation in the well.

F ig. 2 is a fragmentary sectional elevation at the bottom of the well atvright angles to Fig. 1A as indicated by the line 2 2 and looking in the direction indicated by the arrows.

Fig. 3 is a horizontal cross section on the lines 3 3 of Figs. lA and 2 and `looking downwardly as indicated by the arrows.

Fig. 4 is a fragmentary perspective of one of the valve operating constructions.

Fig. 5 is a horizontal sectional detail on the line 5 5 of Fig. 4.

Fig. 6 is a fragmentary sectional detail showing the relative location-of the valves and valve parts.

The pump cylinder consists of an annular wall 1 which is preferably a section of a comparatively large pipe, -a cap -2 being screwed upon the lower end of the wall 1 and a cap 3 screwl upon the upper vend of the wall 1. The inlet valve casing 4 is screwed through the cap 2 and has a chamber 5, an inlet opening 6 in the bottom leading to the chamber 5, and an intake valve 7 covering the opening 6. A pipe 8a is screwed through the center of the cap 3 and extends upwardly to a point above the top of the ground, and a stufng box 8b is formed upon A rod 8 is slidingly mounted through the pipe 82L and through the stuffing box 8b. A float 9 is placed in a cylinder around the rod 8, an

upper stop 10 is fixed upon the rod 8 above the float, and a lower stop 11 is fixed upon the rod 8 below the float, the said stops 10 and 11 being a sufficient distance apart to give the float the proper vertical movement so that when the cylinder lills with the liquid the float will go up and engage the stop 10 and raise the rod 8 so that when the liquid leaves the cylinder the float will strike the stop 11 and the weight of the float will pull the rod 8 downwardly.

An air pipe 12 is connected through the cap 3 to the top of the cylinder chamber 13, and a liquid pipe 14 is fixed through the cap 3 and extends to near the bottom of the chamber 13. The cylinder thus constructed is adapted to be mounted in the bottom vof a water well or oil well, or at least far enough down in the well to be below the top of the liquid 15. The upper end of the pipe 14 is connected to the check valve casing 16 and an up-iiow check valve 17 is mounted in the casing 16. The pump tube 18 is connected to the casing 16 and extends downwardly to a point above the top 19 of the well 20 and the discharge pipe 21 is connected to the upper end of the pipe 18 and leads to any desired point of delivery. y

The rod 8 extends upwardly to the fitting 22 above the stuffing box 8b and a cable 23 is connected to the fitting 22 and extends upwardly over guide pulleys 24 and 25 and downwardly to a counterbalancing weight 26. The weight 26 is adapted to balance the weight of the rod 8 so that the float 9 need have only suiiicient power to overbalance the weight 26 to force the rod 8 up or down.

The air pipe 12 extends from the cylinder upwardly to a point above the top of the well 20 and to the T 27. A branch pipe '28 extends from the 27 to the pressure tank 29 and a. pipe 30extends from the T 27 to the exhaust tank 31.

A stop valve 32 is incorporated into the pipe 28 and a stop valve 33 is incorporated into the pipe 30. A blow-off valve 34 is located at the top of the pressure tank 29 and an intake check valve 35 is located at the top of the exhaust tank 31. A pipe 36 leads from the exhaust tank 31 tothe intake of the pump 37 and a pressure pipe 38 leads A cut-off valve 42 .is incorporated into the pipe 36, a branch inlet pipe 43 is connected yto the pipe 36 behind the valve 42 and provided with a valve 44 and a secondary inlet check valve 45 so that the valve 42 maybe closed and the valve 44 opened to Vraise the pressure in the tanks 29 and 31 to the desired extent to start the operation of pumping. A pressure gage 46 is connected to the top` of the tank 31 and a pressure gage 47 is connected to the top of the tank 29 so as to engage the operating pressure in the tank 29 and the exhaust pressure in the tank 31.

The valves 32 and 33 have ports 48 and 49 set at right angles to each other so that when. the valves are operated simultaneously one will open when the-other closes and vice versa. The ports 48 and 49 are Vformed in the valve plugs 50 and 51 and operating handles 52 and 53 are rigidly connected to the outer ends ofthe valve plugs, the han-- dles being set upon the plugs with the plugs arranged with the ports at right angles as shownin Fig. 6. I

The valve handles 52 and 53Yare substantially alike and each handle has a vertical opening 54 through which the cable 233xtends freely and stops 55 and 56 are adjustably fixed upon the cable 23, one below the handle 52 and the other above the handle 52. In a like manner stops 57- and 58 are Y adjustably fixed upon' the cable 23 above and below the handle 53. The stops 55, 56,

57 land 58 are substantially alike and are' constructed as shown in Figs. 4 and 5, each stop consisting of half bearings '59 and 60 adapted to grip the cable 23 and a U-clip 61 clamping the half bearings 59 and 60 together and gripping the cable.

The stops 55, 56, 57 and 58 are located upon the cable 23 so that when the iloat9 goes down to pull the rod 8 downwardly,

thereby pulling the cable 23 downwardly, the stop 56 will engage on top of the handle 52 and the stop 58 will engage on top of the handle 53 and pull the handles downwardlyl l as. shown on dotted lines in Fig. 1, and

thereby closing the valve 32 and opening the valve 33, then theweight of the head'of liquid 15 in the well will open the check valve 7 and force the liquid into the cylinder until the float 9 goes up and raises the rod 8 to allow the weight 26to pull the operating end of the cable 23 upwardly until the stop 55 raises the handle52 and the stopV 57 raises the handle 53, thereby closing the valve 33 and opening the valve 32, then the pressure from the vtank 29 will pass downwardly through the pipe 12 into the giving a high head of liquid and the pres-V sure of the exhaust in the tank 31 need be onlyv alittle less than the pressure caused by the high head of liquid. Of course if the head of liquid is low the pressure in the exhaust tank must be correspondingly low. When pumping from deep wellswith a highhead of liquid a high exhaust pressure may be maintained in the tank 31, thus feeding the intake air to the pump 37 under a comparatively `high pressure, and thereby greatly reducing the work of the pump.

The difference between the operating pressure in the tank 29 and the return pressure in the tank 31 need be only great enough to overcome theresistance and the difference between the level 62 of the Vhead of liquid in the well and the elevation at which the liquid is delivered from the pipe 21. VOf course the greater the Ydifference between the liquid level in the well and the pointl at which the liquid is to be delivered the greater thedierence between the pressure'in the tank 29 and the pressure in the' tank 31. 1

Thus I'have produced a lpneumatic pump adapted to successively lift Va liquid yfrom a well and 'to 'save theexhaust under pressure for feeding the pump.Y

Various changes may be made without departing from the spirit of myY invention as claimed.' Y Y I claim: Y v

l A pneumatic pump comprising a pump in a v'well and having an intake valve, an air pipe connected to the top of the cylinder, a

liquid pipe leadingV from near the bottom of the cylinder, a check valve in the liquid pipe, a pump tube leading upwardly from the check valve, a rod slidingly mounted through the top of the cylinder, a ioat upon Y the rod in the cylinder, stops upon the rod above and below the float, the rod extending to a point above the top of the well, ay cable connected tothe upper end of the rod and extending over guide pulleys, a weight upon the other end of thecable, stops upon the` cable, branch pipes connectedto the upper end of the air pipe, stop valves in the branch pipes and having plugs with 'ports Vat right angles to each other, arms extending from the plugs and engaging the stopsY upon the cable, an exhaust tank connected to one branch pipe, a pressure tank Vconnected to the other branch "pipe, a pipe leading from the exhaust tank tothe pump, a pipe leading from the pump to the pressure tank; so that sure branch closed, and so that the exhaust when the float goes clown the exhaust air passing through the exhaust branch will branch will be closed and the pressure go to the exhaust tank and to the pump un- 10 branch opened to allow the pressure to force der pressure.

5 the liquid out ofthe cylinder up the pump In testimony whereof I have signed my tube, and so that when the float goes up the name to this specication. exhaust branch will be opened and the pres- HENRY J. HAW V ICHORST. 

